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