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