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