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