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