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