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)(11,15)(12,13)(14,16)(17,18,23,28)(19,30,20,25)(21,32,31,26)(22,29,24,27)(2,5)(6,8)(9,10)(11,14)(12,13)(15,16)(17,19)(18,25)(20,23)(21,24)(22,31)(26,27)(28,30)(29,32) involution — undirected(1,3,4,7)(2,6,5,8)(10,13)(14,15)(17,20,22,31,23,19,24,21)(18,26,27,25,28,32,29,30)(9,11,12,16)(10,14,13,15)(17,21,22,20,23,31,24,19)(18,25,27,32,28,30,29,26)(2,5)(6,8)(17,22,23,24)(18,27,28,29)(19,31,20,21)(25,26,30,32)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.