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