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