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