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