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