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)(19,25,27,23)(21,24,28,29)(26,31,32,30)(1,3,5,8)(2,6,7,4)(9,11,12,16)(10,13,14,15)(18,22)(19,26)(21,29)(23,31)(24,28)(25,30)(27,32)(10,14)(13,15)(17,19,20,27)(18,23,22,25)(21,30,28,31)(24,32,29,26)(1,4,5,6)(2,3,7,8)(11,16)(13,15)(17,18,20,22)(19,23,27,25)(21,24,28,29)(26,30,32,31)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.