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