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