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