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