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