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