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