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