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