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