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