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