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