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