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