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