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