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