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