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)(11,15)(12,14)(13,16)(17,18)(19,25)(20,30)(21,26)(22,32)(23,28)(24,29)(27,31) involution — undirected(9,11)(10,13)(12,16)(14,15)(17,19,23,20)(18,25,28,30)(21,22,24,31)(26,32,29,27)(2,6)(7,8)(10,14)(11,16)(17,20,24,31,23,19,21,22)(18,25,29,32,28,30,26,27)(1,3,5,4)(2,7,6,8)(10,14)(13,15)(17,21,23,24)(18,26,28,29)(19,22,20,31)(25,32,30,27)(1,4,5,3)(2,8,6,7)(17,22,24,20,23,31,21,19)(18,27,29,25,28,32,26,30)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.