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