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