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