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