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