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