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)(11,13)(12,14)(15,16)(17,18,22,27)(19,20,25,24)(21,32,23,26)(28,30,31,29)(1,3,5,4)(2,6,7,8)(9,11,12,15)(10,13,14,16)(17,18)(19,28)(20,29)(21,26)(22,27)(23,32)(24,30)(25,31)(1,4,5,3)(2,6,7,8)(10,14)(13,16)(17,19)(18,24)(20,27)(21,30)(22,25)(23,29)(26,31)(28,32)(17,20)(18,25)(19,27)(21,31)(22,24)(23,28)(26,30)(29,32) involution — undirected(17,21,22,23)(18,26,27,32)(19,29,25,30)(20,31,24,28)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.