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