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