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