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