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