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