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