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