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