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