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