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