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