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