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