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