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