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