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