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