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