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