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