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