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