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