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