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