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