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)(19,25)(20,24)(21,22)(23,26)(27,31)(28,29)(30,32) involution — undirected(1,2)(3,8)(4,5)(6,7)(9,10,13,14)(11,15,16,12)(18,22)(23,25)(24,29)(30,31)(2,7)(3,4)(9,11)(10,12)(13,16)(14,15)(19,26)(20,28)(23,25)(24,29) involution — undirected(1,3,6,4)(2,8,7,5)(9,12)(10,11)(13,15)(14,16)(17,19)(18,23)(20,27)(21,26)(22,25)(24,30)(28,32)(29,31)(1,4,6,3)(2,5,7,8)(9,10)(11,12)(13,14)(15,16)(17,20)(18,24)(19,27)(21,28)(22,29)(23,30)(25,31)(26,32)(1,5)(2,3)(4,7)(6,8)(9,12)(10,11)(13,15)(14,16)(17,18)(19,23)(20,24)(21,22)(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.