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