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