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