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