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