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