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