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