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