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