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