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