One vertex per element, one color per generator, with an edge from x to x·s.
(2,7)(5,13)(8,14)(9,15)(10,16)(11,12)(17,18)(19,24)(20,32)(21,26)(22,36)(23,27)(25,34)(28,41)(29,38)(30,39)(31,45)(33,40)(35,46)(37,44)(42,48)(43,47) involution — undirected(1,2,5,7,6,10,13,16)(3,8,11,14,4,9,12,15)(17,19)(18,24)(20,28)(21,30)(22,31)(23,29)(25,37)(26,39)(27,38)(32,41)(33,43)(34,44)(35,42)(36,45)(40,47)(46,48)(1,3,6,4)(2,8,10,9)(5,11,13,12)(7,14,16,15)(17,20,22,34,23,35,21,33)(18,25,26,32,27,40,36,46)(19,28,31,44,29,42,30,43)(24,37,39,41,38,47,45,48)(1,4,6,3)(2,9,10,8)(5,12,13,11)(7,15,16,14)(19,29)(24,38)(28,42)(30,31)(37,47)(39,45)(41,48)(43,44)(3,4)(8,9)(11,12)(14,15)(17,21,23,22)(18,26,27,36)(19,30,29,31)(20,33,35,34)(24,39,38,45)(25,32,40,46)(28,43,42,44)(37,41,47,48)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.