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