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