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