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