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