One vertex per element, one color per generator, with an edge from x to x·s.
(2,4)(6,7)(10,13)(14,16)(17,18)(19,22)(20,25)(21,24)(23,27)(26,30)(28,32)(29,31) involution — undirected(9,10)(11,14)(12,13)(15,16)(17,18,22,19)(20,23,27,25)(21,26,30,24)(28,32,29,31)(1,2,5,4)(3,7,8,6)(18,19)(20,27)(24,26)(28,29)(1,3,5,8)(2,6,4,7)(17,19,22,18)(20,25,27,23)(21,26,30,24)(28,32,29,31)(1,4,5,2)(3,7,8,6)(9,11,12,15)(10,14,13,16)(17,20)(18,23)(19,25)(21,29)(22,27)(24,32)(26,31)(28,30)(17,21,22,30)(18,24,19,26)(20,28,27,29)(23,31,25,32)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.