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