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