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