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