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