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