One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,5)(4,9)(6,7)(8,11)(10,13)(12,16)(14,15)(17,18)(19,28)(20,31)(21,22)(23,24)(25,29)(26,30)(27,32)(33,34,39,36)(35,42,41,38)(37,40,45,44)(43,48,47,46)(2,7)(5,8)(9,15)(13,16)(18,24)(19,29)(21,27)(26,31)(37,45)(40,44)(43,47)(46,48) involution — undirected(1,3,6,11)(2,5,7,8)(4,12,14,10)(9,16,15,13)(17,19)(18,25)(20,27)(21,30)(22,31)(23,29)(24,28)(26,32)(33,35)(34,38)(36,42)(37,43)(39,41)(40,46)(44,48)(45,47)(1,3)(2,8)(4,10)(5,7)(6,11)(9,16)(12,14)(13,15)(17,20,23,30)(18,26,24,31)(19,27,29,21)(22,25,32,28)(33,36,39,34)(35,42,41,38)(37,44,45,40)(43,48,47,46)(1,4)(2,9)(3,10)(5,13)(6,14)(7,15)(8,16)(11,12)(17,21,23,27)(18,22,24,32)(19,30,29,20)(25,31,28,26)(33,37,39,45)(34,40,36,44)(35,43,41,47)(38,46,42,48)(1,5,6,8)(2,3,7,11)(4,13,14,16)(9,10,15,12)(17,22)(18,27)(19,31)(20,25)(21,24)(23,32)(26,29)(28,30)(33,38,39,42)(34,41,36,35)(37,46,45,48)(40,47,44,43)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.