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