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