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