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