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