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