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