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