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