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