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