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