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