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