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