One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,5)(4,7)(6,12)(8,10)(9,14)(11,15)(13,16)(17,18)(19,20)(21,25)(22,24)(23,27)(26,28)(29,31)(30,32)(33,34)(35,38)(36,39)(37,40)(41,42)(43,48)(44,47)(45,46) involution — undirected(1,3)(2,8)(4,5)(6,11)(7,10)(9,15)(12,13)(14,16)(17,19)(18,23)(20,24)(21,29)(22,27)(25,28)(26,30)(31,32)(33,35)(34,38)(36,42)(37,45)(39,41)(40,46)(43,47)(44,48) involution — undirected(2,4)(3,10)(9,12)(11,16)(18,24)(20,23)(25,32)(28,31)(34,36)(35,41)(40,44)(43,45) involution — undirected(1,4,7,2)(3,5,10,8)(6,12,14,9)(11,13,16,15)(17,20,22,23)(18,19,24,27)(21,28,30,31)(25,26,32,29)(33,36,39,34)(35,42,41,38)(37,44,47,40)(43,46,45,48)(1,5)(2,3)(4,10)(6,13)(7,8)(9,11)(12,16)(14,15)(17,21)(18,25)(19,26)(20,28)(22,30)(23,31)(24,32)(27,29)(33,37,39,47)(34,40,36,44)(35,43,41,45)(38,48,42,46)(1,6)(2,9)(3,11)(4,12)(5,13)(7,14)(8,15)(10,16)(17,19)(18,23)(20,24)(21,29)(22,27)(25,28)(26,30)(31,32)(33,38,39,42)(34,41,36,35)(37,46,47,48)(40,43,44,45)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.