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