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