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