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