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