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