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