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