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