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