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