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