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