One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,3)(5,6,11,16)(7,17,8,20)(9,14,10,15)(12,18,13,19)(21,22,25,28)(23,29,30,36)(24,32,33,27)(26,34,35,31)(1,3,4,2)(5,7,11,8)(6,12,16,13)(9,18,10,19)(14,17,15,20)(24,33)(27,32)(29,36)(31,34)(5,8,11,7)(6,13,16,12)(9,18,10,19)(14,17,15,20)(21,23)(22,26)(24,34)(25,30)(27,36)(28,35)(29,32)(31,33)(5,9,11,10)(6,14,16,15)(7,18,8,19)(12,17,13,20)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.