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