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