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