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