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