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