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)(11,13)(12,14)(15,16)(17,18)(19,26)(20,29)(21,24)(22,25)(23,30)(27,28)(31,32)(1,3)(2,6)(4,7)(5,8)(9,10)(11,15)(12,14)(13,16)(17,19)(18,24)(20,27)(21,22)(23,28)(25,26)(29,32)(30,31) involution — undirected(9,11)(10,13)(12,16)(14,15)(17,20,29,18,22,30,23,25)(19,27,32,24,21,31,28,26)(3,8)(6,7)(11,16)(13,15)(17,21,22,19)(18,24,25,26)(20,27,30,31)(23,32,29,28)(1,4,5,2)(3,7,8,6)(10,14)(13,15)(19,21)(24,26)(27,31)(28,32)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.