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