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