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)(19,24)(20,25)(21,26)(22,23)(27,31)(28,32)(29,30)(33,34)(35,38)(36,43)(37,40)(39,44)(41,47)(42,46)(45,48) involution — undirected(1,3)(2,8)(4,5)(6,11)(7,10)(9,15)(12,13)(14,16)(18,23)(24,25)(26,29)(31,32)(33,35,37,42)(34,38,40,46)(36,41,44,48)(39,45,43,47)(2,4)(3,10)(9,12)(11,16)(17,19,22,20)(18,24,23,25)(21,27,30,28)(26,31,29,32)(33,34,37,40)(35,38,42,46)(36,39,44,43)(41,45,48,47)(1,4,7,2)(3,5,10,8)(6,12,14,9)(11,13,16,15)(17,20,22,19)(18,25,23,24)(21,28,30,27)(26,32,29,31)(33,34)(35,38)(36,39)(37,40)(41,45)(42,46)(43,44)(47,48)(1,5)(2,3)(4,10)(6,13)(7,8)(9,11)(12,16)(14,15)(17,18)(19,24)(20,25)(21,29)(22,23)(26,30)(27,32)(28,31)(33,35)(34,38)(36,41)(37,42)(39,45)(40,46)(43,47)(44,48) involution — undirected(1,6,7,14)(2,9,4,12)(3,11,10,16)(5,13,8,15)(17,21,22,30)(18,26,23,29)(19,27,20,28)(24,31,25,32)(33,36)(34,39)(35,41)(37,44)(38,45)(40,43)(42,48)(46,47)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.