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)(17,18,21,24,22,23,30,31)(19,25,27,28,26,32,29,20)(9,11)(10,13)(12,15)(14,16)(17,19,22,26)(18,20,23,28)(21,29,30,27)(24,32,31,25)(2,5)(6,8)(11,15)(13,16)(18,23)(19,26)(24,31)(27,29) involution — undirected(11,15)(13,16)(17,20)(18,19)(21,25)(22,28)(23,26)(24,27)(29,31)(30,32) involution — undirected(1,3,4,7)(2,6,5,8)(10,14)(13,16)(18,23)(20,28)(24,31)(25,32)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.