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