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