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