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