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