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