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