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