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