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