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