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