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