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