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