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