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