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