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